/*
 * Copyright 2014 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef SkReadPixelsRec_DEFINED
#define SkReadPixelsRec_DEFINED

#include "include/core/SkImageInfo.h"
#include "include/core/SkPixmap.h"

#include <cstddef>

/* *
 * Helper class to package and trim the parameters passed to readPixels()
 */
struct SkReadPixelsRec {
    SkReadPixelsRec(const SkImageInfo &info, void *pixels, size_t rowBytes, int x, int y)
        : fPixels(pixels), fRowBytes(rowBytes), fInfo(info), fX(x), fY(y)
    {}

    SkReadPixelsRec(const SkPixmap &pm, int x, int y)
        : fPixels(pm.writable_addr()), fRowBytes(pm.rowBytes()), fInfo(pm.info()), fX(x), fY(y)
    {}

    void *fPixels;
    size_t fRowBytes;
    SkImageInfo fInfo;
    int fX;
    int fY;

    /*
     * On true, may have modified its fields (except fRowBytes) to make it a legal subset
     * of the specified src width/height.
     *
     * On false, leaves self unchanged, but indicates that it does not overlap src, or
     * is not valid (e.g. bad fInfo) for readPixels().
     */
    bool trim(int srcWidth, int srcHeight);
};

#endif
